ISTANBUL, TURKEY - NOVEMBER 30: An aerial photo of Bulgarian St. Stephen Church is seen which was under extensive restoration before its opening ceremony in Istanbul, Turkey on November 30, 2017. Turkish President Recep Tayyip Erdogan and Prime Minister of Bulgaria Boyko Borisov will attend the opening ceremony on January 7, 2018. (Photo by Muhammed Enes Yildirim/Anadolu Agency/Getty Images)